Answer:
13
Step-by-step explanation:
Answer: She will loose 75 min. (1 hour and 15 minutes)
Step-by-step explanation:
Answer:
find 80 percent
Step-by-step explanation:
2x-4(x+1)=-13
1) we solve this equation:
2x-4(x+1)=-12
2x-4x-4=-12
-2x=-12+4
-2x=-8
x=-8/-2
x=4
2) we evalute x²-1
x²-1=4²-1=16-1=15
Answer: 15